Effect of Thermomechanical Treatments on the Microstructure of AZ91 Alloy

  1. Prof. Dr.-Ing. K. U. Kainer
  1. N. V. Ravi Kumar,
  2. J. J. Blandin and
  3. M. Suéry

Published Online: 15 MAY 2006

DOI: 10.1002/3527607552.ch27

Magnesium Alloys and their Applications

Magnesium Alloys and their Applications

How to Cite

Ravi Kumar, N. V., Blandin, J. J. and Suéry, M. (2006) Effect of Thermomechanical Treatments on the Microstructure of AZ91 Alloy, in Magnesium Alloys and their Applications (ed K. U. Kainer), Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim, FRG. doi: 10.1002/3527607552.ch27

Editor Information

  1. GKSS-Forschungszentrum Geesthacht GmbH, Institut für Werkstofforschung, Max-Planck- Straße, D-21502 Geesthacht, Germany

Author Information

  1. Institut National Polytechnique de Grenoble (INPG), Génie Physique et Mécanique des Matériaux (GPM2), UMR CNRS 5010, ENSPG, BP 46, 38402 Saint-Martin d'Héres Cedex, France

Publication History

  1. Published Online: 15 MAY 2006
  2. Published Print: 20 SEP 2000

ISBN Information

Print ISBN: 9783527302826

Online ISBN: 9783527607556

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Keywords:

  • magnesium alloys;
  • microstructure;
  • AZ91 alloy;
  • effect of thermomechanical treatments

Summary

The effect of various thermomechanical treatments like extrusion and rolling on grain refinement is studied in cast AZ 91. Extrusions with a 16:1 ratio were performed between 300 °C and 400 °C and grain sizes smaller than 10 µm have been obtained. Further, Vickers hardness measurements were carried out to evaluate the effect of these treatments on the mechanical properties. Additional grain refinement was attempted by rolling the extruded specimens. Aging characteristics for these materials was also investigated and the effect of pre-strain at room temperature was found to promote continuous precipitation of Mg17Al12.